Doug,
Those mods make a big difference the cheap spindexers. I did very similar for my T&C grinder. I did consider making a tail stock but so far I have not had need for one.
There is one extra modification that I did to mine. As they come it is very hard to remove all endfloat and still have a smooth rotation so I decided to keep it loaded with a spring. I didn't have one of the right size and I used a bunch of O-rings instead. Lack of endfloat was critical for my main application and this fixed it perfectly. Details are shown in a previous post
http://www.homemadetools.net/forum/h...6205#post83248
I also had a need for smooth low friction combined longitudinal and rotational motion and so I converted it to work as an air bearing when needed. This is only of use in specific applications.
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